I stared at him for a long long moment, then turned heavily for the door.

"I'll tell you why, Mr Mahler," I said slowly. "It's because I'm the biggest damned prize idiot in this world, that's why."

And I went out to tell Hillcrest just how idiotic I was.

Chapter ten—Thursday 4 p.M.—Friday 6 p.M.

Jackstraw, Corazzini and I took turns at driving the Citroen all through that evening and the following night. The engine was beginning to run rough, the exhaust was developing a peculiar note and it was becoming increasingly difficult to engage second gear. But I couldn't stop, I daren't stop. Speed was life now.

Mahler had gone into collapse shortly after nine o'clock that evening, and from the collapse had gradually moved into the true diabetic coma. I had done all I could, all anyone could, but heaven only knew it was little enough. He needed bed, heat, fluids, stimulants, sugar by mouth or injection. Both suitable stimulants and the heat were completely lacking, the lurching, narrow, hard wooden bunk was poor substitute for any bed, despite his great thirst he had found it increasingly difficult to keep down the melted snow water, and I had no means of giving an intravenous injection. For the others in the cabin it was distressing to watch him, distressing to listen to the dyspnoea—the harsh laboured breathing of coma. Unless we could get the insulin in time, I knew no power on earth could prevent death from supervening in from one to three days—in these unfavourable conditions, a day would be much more likely.

Marie LeGarde, too, was weakening with dangerous speed. It was with increasing difficulty that she could force down even the smallest mouthfuls of food, and spent most of her time in restless troubled sleep. Having seen her on the stage and marvelled at her magnificent vitality, it now seemed strange to me that she should go under so easily. But her vitality had really been a manifestation of a nervous energy: she had little of the physical resources necessary to cope with a situation like this, and I had frequently to remind myself that she was an elderly woman. Not that any such reminder was needed when one saw her face: it was haggard and lined and old.

But worried though I was about my patients, Jackstraw was even more deeply concerned with the weather. The temperature had been steadily rising for many hours now, the moaning ululation of the ice-cap wind, which had been absent for over two days, was increasing in intensity with every hour that passed, and the skies above were dark and heavy with black drifting clouds of snow. And when, just after midnight, the wind-speed passed fifteen miles an hour, the wind began to pick up the drift off the ice-cap.

I knew what Jackstraw was afraid of, though I myself had never experienced it. I had heard of the katabatic winds of Greenland, the equivalent of the feared Alaskan wllliwaws. When great masses of air in the heart of the plateau were cooled, as they had been in the past forty-eight hours, by extremely low temperatures, they were set in motion by a gradient wind and cascaded—there was no other word for it—downwards from the edge of the plateau through suitable drainage channels. Set in motion through their own sheer weight of cold air, these gravity or drainage winds, slowly wanned by the friction and compression of their descent, could reach a hurricane force of destructive violence in which nothing could live.

And all the signs, all the conditions for a gravity storm were there. The recent extreme cold, the -rising wind, the rising temperature, the outward flowing direction of the wind, the dark star-obscuring clouds scudding by overhead—there could be no mistaking it, Jackstraw declared. I had never known him to be wrong about Greenland weather, I didn't believe him to be wrong now, and when Jackstraw became nervous it was time for even the most optimistic to start worrying. And I was worried all right.

We drove the tractor to its limit, and on the slight downward slope—we had changed direction by this time and were heading due south-west for Uplavnik—we were making very good time indeed. But by four o'clock in the morning, when we were, I reckoned, not more than sixty miles from Uplavnik, we ran into the sastrugi and were forced to slow down.

The sastrugi, regular undulations in the frozen snow, were the devil on tractors, especially elderly machines like the Citroen. Caused by raking winds, symmetrical as the waves in an eighteenth-century sailing print, hard on the crest and soft in the trough, they made progress possible only by slowing down to a disheartening crawl. Even so the Citroen and the sledges behind rolled and pitched like ships in a heavy seaway, the headlights one moment reaching up into the lowering darkness of the sky, the next dipping to illuminate the barred white and shadowed black of the sastrugi immediately ahead. Sometimes it gave way to deceptively clear patches—deceptively, for snow had obviously fallen here recently or been carried down from the plateau, and we were reduced to low gear to make any headway at all on it.

Shortly before eight o'clock in the morning Jackstraw brought the Citroen to a halt, and as the roar of the big engine died the deep moaning of the wind, a wind carrying with it a rising wall of ice and snow, swept in to take its place. Jackstraw had drawn up broadside on to the wind and the slope of the hill and I jumped down to rig up a canvas shelter extending out from the cabin: it was nothing elaborate, just a triangular sheet of proofed canvas attached to the top of the cabin and the cleat of a caterpillar track on its vertical side, with its apex stretched out to a spike hammered into the surface of the ice-cap: there was no room for us all within the cabin at meal-times, I wanted some protection when we kept our 8 a.m. radio schedule with Hillcrest, and, in particular, it was time that Zagero and Levin had some relief from their sufferings. They had ridden all night on the tractor sled, under the guard of either Jackstraw or myself, and though the temperature was now only a few degrees below zero and though they were sheltering under a mound of clothing, nevertheless they must have spent a miserable night.

Breakfast, such as it was, was waiting and ready to be eaten as soon as the tractor had stopped, but I had little appetite for it: it seemed to me I had forgotten what sleep was like, I had had none for almost three days, I was living now in a permanent state of physical and mental exhaustion and it was becoming almost impossible to concentrate, to think of the hundred and one things that had to be thought of all the time. More than once I caught myself nodding and dozing off over my cup of coffee, and it was only with a conscious effort of will that I forced myself to my feet to keep the radio schedule. I was going to call both Hillcrest and our base—Hillcrest had given me the frequency the previous evening. I decided to call Hillcrest first.

We got through without any difficulty, although Hillcrest said they could hear me only very faintly. I suspected some fault on the generator side, for our receiver was powered by a hundred-hour battery and we could hear Hillcrest's voice clearly.

All the men except Mahler were gathered round me during the transmission—they seemed to find a peculiar reassurance in another voice—however distant and disembodied that voice—and even Zagero and Levin were only seven or eight feet away, sitting in front of the tractor sled with their feet still bound. I was on a canvas chair, with my back to the canvas screen, and Corazzini and Brewster were sitting on the tailboard, the canvas curtains drawn behind them to keep the heat in the cabin. The Rev. Smallwood was behind me, turning the generator handle, and Jackstraw a few feet away, watchful as ever, the cocked rifle ready in his hand.

"Receiving you loud and clear," I said to Hillcrest. My hands were cupped round the microphone and I was holding it close to my mouth to cut out as much as possible of the background noise of the wind. "What progress?" I threw the receiver switch into the antenna, and Hillcrest's voice came again.

"Great!" He sounded enthusiastic, excited. "My congratulations to your learned friend. Works like a charm and we're going like a bomb. We are approaching the Vindeby Nunataks and expect to be through by this afternoon."

This was wonderful news. With any luck he would be up with us late in the evening of that day, and we would have the moral support of his company and the even more important technical resources of everything his big modern Sno-Cat could offer. And Jackstraw and I could get some desperately needed sleep. ... I became aware that Hillcrest was continuing, his voice still charged with the same suppressed excitement.

"The Admiralty or the Government or whoever it is have loosened up at last! Brother, you're sitting on dynamite and you don't know it. You've got it right there with you and you could exchange it tomorrow for a million pounds in the right place. No wonder the Government were so cagy, no wonder they knew something fishy was going on and mounted the biggest search ever. The carrier Triton's going to collect it personally—"